Maniac, based off the Norwegian series of the same name, follows Hill’s character, an inpatient at a mental institution, who lives out adventures in his dreams. The dark comedy is directed by True Detective‘s Cary Fukunaga, and costars Stone as a fellow patient in the institution.

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“I gained weight for this movie War Dogs, and then I wanted to get in better shape, so I called Channing Tatum, and said, ‘Hey, if I ate less and go to a trainer, will I get in better shape?’ And he said, ‘Yes, you dumb motherf—–, of course you will, it’s the simplest thing in the entire world,’” Hill said on The Tonight Show with Jimmy Fallon.